The two sets of double doors are most likely closets given they have ball catches at the tops of the doors; those doors have dummy knobs (levers, in this case). Not that they couldn't have door casings, but in this case (;P) they don't, perhaps to help differentiate them from entrance doors into rooms.

What Houzz contributors are saying:

A great way to address lighting in a hallway with a low ceiling is to create repetition using a flush-mounted ceiling light. This repetitive pattern can create interest and drama when you don't have the space for a larger fixture.

8. Dress up the hall. Add a series of light fixtures down a long hallway. The flush-mounted pendants, in conjunction with the molding on the ceiling, leads you down the hall without a verbal invitation.
More:
Dramatic Lighting for Low Ceilings
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8 Ideas for Lighting Your Entry

This hallway combines both recessed and surface-mounted fixtures. This combination creates additional flexibility for night lighting — particularly important for young and old when visiting the bathroom. The ceiling-mounted fixtures or the pot lights could also be triggered by a motion sensor for safe navigation during the night without anyone's having to remember where the light switch is.

2. Take down art. Any art hanging on a wall should be removed before demolition. Often the stress or vibration of removing tile from the back side of the wall can cause paintings to fall and glass to break.